/// Removes the unit (e.g. px, em, rem) from a value, returning the number only.
///
/// @param {Number} $num - Number to strip unit from.
/// @returns {Number} The same number, sans unit.
/// @link https://github.com/zurb/foundation-sites/blob/develop/scss/util/_unit.scss
@function strip-units($number){
	@return $number / ($number * 0 + 1);
}
